Copying and Pasting Data
Highlight the value you want to copy and press Ctrl+C or Ctrl+Ins.
To paste, use Ctrl+V or Shift+Ins.
For operations with numbers it is convenient to use the buttons of the Standard toolbar:
The following buttons are useful in operations with numbers:
"M" - memorize the value;
"M+" - add the highlighted value to the one in memory;
"M+" - subtract the highlighted value from the one in memory.
To highlight a value you should simply point a cursor to it.